allow None for station_api_port
allow None for station_api_port

ShaperTools/openhtf,jettisonjoe/openhtf,google/openhtf,fahhem/openhtf,grybmadsci/openhtf,ShaperTools/openhtf,ShaperTools/openhtf,fahhem/openhtf,grybmadsci/openhtf,grybmadsci/openhtf,ShaperTools/openhtf,jettisonjoe/openhtf,google/openhtf,fahhem/openhtf,google/openhtf,ShaperTools/openhtf,fahhem/openhtf,jettisonjoe/openhtf,jettisonjoe/openhtf,google/openhtf,grybmadsci/openhtf